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<br /> U.S. GEOLOGICAL SURVEY McCALLUM AREA <br />` DR ILL-HOLE LOG, JACKSON COUNTY, COLORADO <br />Hole No. C28 Map Cowdrey Date logged 9/16/7 7 Elevation (f t) 8110 <br />Location: T. 10 N. , R. 79 W. , sec. 33 2150 F N L 650 FE L Cored: ~ Yes ® No <br />Drilled depth 200' Logged depth 200' Drilling medium air Fluid level 106' <br />Geophysical lo gs: <br />Spontaneous potenti al (SP): Scale 50 my/in Logging speed 20 fpm <br />Resistivity (RES): Scale 500 ohms/in Logging speed 20 fpm <br />Gamma (G): T.C. 4 Scale 200 cos/in Logging speed 20 fpm <br />Density (DEN ): T.C. 4 Scale 8 cps/in Logging speed 20 fpm <br />Remarks: <br />LITHOLOGY <br />w <br />GEOPHYSICAL LOGS ~I DEPTH <br />C SP RES DEN I FT I M <br />0- 19 - Shaly mudstone, brownish-gray <br />19-129 - Mudstone, light-gray and medium- <br />gray -- <br />129-131 - COAL <br />131-162 - Silty mudstone, very light gray <br />162-164 - COAL - <br />164-200 - Silty mudstone, very light gray -' <br />and medium-light-gray mudstone; ~=~= <br />sandstone, very light gray, -~ <br />medium-grained, 173'-174' _ <br />10 <br />50 <br />20 <br />100 30 <br />40 <br />150 <br />50 <br />200 60 <br />70 <br />250 <br />80 <br />90 <br />300 <br />76 <br />